Abstract
In this work, an experimental study has been carried out to analyse the effect of wavy delta winglets on Nusselt number (Nu) and friction factor (f) in solar air passage for a specified range of system and operating parameters. The geometrical parameters considered are the number of waves (ϕ)=3 to 7, the relative longitudinal pitch (P/H)=3 to 6, and the angle of attack (α) = 30° to 75°. A fixed values of relative winglet chord length (c/H = 1.4) and relative blockage height (b/H = 0.5) are considered in the present study. The experimental data are generated for Nusselt number and friction factor for different combinations of geometrical and flow parameters and correlations for Nusselt number and friction factor are also developed. Further, the developed correlations are deployed for the parametric optimization based on effective efficiency.
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